Molding machine



Aug. 30, 1932. c. F. SCHERER MOLDING MACHINE Filed April 26. 1930 2Sheets-Sheet i C FSCHEFE'H. INVENTOR.

30, '1932- c. F. SCHERER ,374,635

MOLDING MACHINE Filed April 25, 1930 2 Sheets-Sheet 2 Cf. 15' CH EfiEfi-INVENTOR.

I BY W7 7 A TTORNEY Patented Aug. 39, 1932 i} amass stares arsh r orne sGiana-nasal 'sonnnnn; onnnvnnronir, sown, Assmnon To'nAvENronT"M'ACHIEIE AND} FoUNnRa'coMPnnY; orjnnvnnroaniowngn- CORPORATION oF'IowA5 MOLDING Mac-mun.

.' Application filed A'pzil26,

v The present invention relates to molding machines and more especiallyto a rollsover machine-in which the actuating mechanism is encased so asto preventsand from get- 5 ting into the wearing parts and causing unduewearing thereof. I I

Among the objects of this invention are to provide in a machine of thecharacter indicated means for keeping sand and other ibradents away fromaccess to parts subject to considerable wear; to provide adjusting meansto compensate for diilerent loads so that the pattern plate and its loadwill always pass dead center when being :urned over from one side to theother; to provide an enclosed check cylind r by means of which thedescent of the roll-over arms and their load may be checked so that theload will be set down without any sudden .29 jolt; and such furtherobjects, advantages and capabilities as will hereafter appear and as areinherentin the construction disclos d herein. My invention furtherresides in the combination, construction and arrangement 31 partsillustrated in the accompanying drawings and, while I have shown thereinwhat is now consid red the preferred embodiment of this invention, Idesire the same to be understood as illustrative only and not '.'0 beinterpreted in a limiting sense.

In the drawings annexed hereto and forming a parthereof, Fig. 1 is afragmentary side elevation of a structure embodying invention with partsthereor broken away for the sake of better illustration; and 2 is a planview of the structure shown in Fig. 1 with the cover can thereof removedto show th interior mechanism.

Referring more in detail to the annexed drawings, casino; 1 is shown asprovided with a cap 2 which may be removed therefrom by removing certainbolts 3' passing through a ring; 4 a d into the cover 2. This ring issecured to the casing l by means of bolts 5. It will be obvious from 2that the casing and its cover have depressions in the ends thereof,which permit the rin and bolts 3 and 5 to es set in so that they willnot project beyond the ends of the casing. I will also be obvious fromFig. 1 that it 1930. Serial my. 447,564.:

will only be-necessary to remove two bolts 3 at each endloftlie machinetoentirely release thev cover Q'trom the casing 1'. Since the top ofthe'casingand'the bottom of'the cover are made to'fit: closely, therewill be no trouble Pith sand or other gritgetting' inside 01 the casing.and into the operating mechanism therein.

Mounted in the lower part of the casing 1 is a supportinq. shaft 6 uponwhich are mountedthecheck cylinden 7 and the lifting cylinders 8. Pistonrods 9 and lo'connect the piston heads-in these cylinder-s withappropriate means, as indicated in Fig. 2, whereby turning forcemaybetransmitted to the rollover arms. Each piston rod has an eye 11 atitsfree end by means of which connection is made to -a yoke 24'. v Thisyoke 121$ arms which are designated in F 2 by the numerals 12. Itv willbe seen that as the pistons in cylinders 8 are moved upwardly theroll-over arms 14 swing; in vertical" circles and the piston 15in checkcylinder 7 simultaneously moves upwardly but at a slower rate' When theroll-over arms 14: and pattern-plate carried thereby pass dead center.andl begin to move downwardly on the. other side,,the check cylinder 7may come into play, thereby, checking the descent oi the oad and:permitting it. to come to rest V upon the supporting table. I i The endsofthe trunnions are squared as indicatedat 1-7 and the roll-over armshave openings ofthe same size and shapeso that they fit closely thesesquared portions oft'he trunnionsv Therefore, power applied by meansofthe cylinders 8 is transmittedto the roll-over arms 14' in a mannerwhich will be readily understood. The plates 18, .19, 20 and 21constitute composite arms connectingthe yoke 2 l with: the trunnions of"the roll-over arms. iBy comparison of Figs. 1 and 2 it willbe seen thatwhen bolts 22' are removed from these composite arms the parts 19 and 21may. be moved relatively to 18 and '20 until the desired adjustment issecured when the bolts may be reinserted and tightened up into holding.position. WVlien the proper adjustment hasbeensecured', the bolts 23:will be tightenedup toassistiin holdingthe'parts together as ifconstructed unitary. Particular reference is now made to Fig. 1 fromwhich it will be'seen that there are five positions of adjustment whichthe arms 18 and 19 (and also 20 and 21) may assume relatively to eachother. As illustrated in this figure, the arms are in mid-position, itbeing possible to adjust either upwardly or downwardly two points fromthe position illustrated. In this way, there is provided a wide range ofadjustment for the parts.

As shown clearly in the drawings, a concave con nectin bar joins theplates 19 and 21, making a unitary yoke. Also, webs 25 are connectedwith the concavebar and have the shafts 13 mounted in openings therein.These shafts are also mounted in openings in the bosses 26 formedon theplates 19 and 21. It will therefore be seen that the piston rods 10 arenot adjustable relatively to a crank arm though there is relativeadjustment between the crossbar or yoke 24 and the roll-over trunnions.Therefore, adjustment is permitted between the cross bar 24 and thepattern-plate, with the load carried thereby.

It will be seen from the foregoing description, taken in connection withthe annexed drawings, that I have provided a simple mode of preventingany appreciable amount of grit from entering the bearings of a machineof this type, as well as preventing same from getting into check androll-over cylinders and causing unnecessary wear thereof. It willalso'be seen that means for accomplishing adjustments to compensate forchanges in location of the center pf ravity of the rollover'arms andtheir Having now described my invention, 1 claim: a V I p 1 In aroll-over machine, a closed casing having bearings in opposite sidesthereof, trunnions mounted in said bearings, operating arms rigidlyconnected with said trunnions, operating means within the casing andhaving movable connection with said arms, the means connectingtheoperating means to the arms being shiftable from place to place tocompensate for changes in location of the center of gravityof theroll-over arms and their load, the casing being adapted to preventaccessof sand or other. grit to the moving parts within'the casing.

2. In a roll-over machine, a support having .bearings in opposite sidesthereof, trunnions,

, mounted in and rotatable within the'bearings,arms rigid with thetrunnions and extending laterally therefrom, a cross bar havtransversearms, said operating means having relatively fixed pivotal connect-ionwith the yoke whereby actuation of the 0 rating mechanism. will causerotation of t e trunnions and with them of the roll-over arms.

In witness whereof, I hereunto subscribe my name to this specification.

CHAS. F. SCHERER.

have provided simple a ing armsextending laterally therefrom, said f Ilast mentioned arms being capable of being connected to the first namedarms, the two sets of arms being adjustably connected by re-. movablesecuring means by means of which they may be secured together in any oneof several positions of adjustment.

